He first appeared arriving in Ponyville, kicking and punching buildings. Twilight Sparkle and Spike watch this in horror and Twilight claimed that they had to look for the Elements of Harmony to stop him, but so far everyone's been failing to be of help. ("DRESS.MOV")

He once wasn't looking where he was going and crushed Applebloom to death, just after she got her cutie mark. ("SHED.MOV")

Princess Celestia tried to take him down herself, but got her head eaten off by the monster. To make things worse, he teamed up with a demon named Wolflor (who was accidently summoned by Twilight when she was trying to bring Rainbow Dash back to life) and a robot replica of Rainbow Dash called the R-Dash 5000. ("MAGIC.MOV")

He and Wolflor were shown having sex and the R-Dash 5000 learned to duplicate itself, making it worse by causing a tornado with meteors falling out of the sky. ("PARTY.MOV")

He, along with Wolflor and the R-Dash 5000 clones, then made Ponyville into a complete wasteland. Thanks to the sonic rainboom performed by Rainbow Dash (who was really in a coma), she was able to reverse time making her Rainbow-Titan so she could fight Discord herself. Discord almost won the fight by ripping out Rainbow's wings, but soon lost when Rainbow got up and had Twilight summon the Holy Sword of the Titans and sliced his head off. Discord's head later fell out of the sky and landed in Fluttershy'sshed. ("SWAG.MOV")